(c)Magnesium nitride is also an ionic compound. Draw a dot-and-cross diagram which shows its formula, the charges on the ions and the arrangement of the valence
electrons around the negative ion.
Use x to represent an electron from a magnesium atom.
Use o to represent an electron from a nitrogen atom.
[3]
2. Calculate the percent composition of ammonium nitrate, NH4NO3
.
(Calculate the % by mass of each element in ammonium nitrate.)

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

the answer is minerals.

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